International Business Machines Corporation

Timothy Peter Krein

Scott Thomas Marcotte

Gregory David Doolittle

Michael John Morton

John Leslie Harter

Frederick Aaron Schwartz

Peggy Pak-Fan Dixon

Deadlock situations within a computing environment are avoided by properly managing pools of threads used to service requests of the computing environment. When a server of the computing environment receives a request to be processed and that request is waiting on a response from a client of the computing environment, the set of eligible thread pools for the response is dynamically altered. This dynamic altering allows the response to be serviced by a thread pool different from the thread pool servicing the request, thereby avoiding a deadlock situation.

Method, system and program products for managing thread pools of a computing environment to avoid deadlock situations

Method, system and program products for managing thread pools of a computing environment to avoid deadlock situations by dynamically altering eligible thread pools

In a computing environment having clients with different semantics or protocols, a capability is provided that enables those clients to share the same data or files. A token management function is provided that allows clients that did not previously support token management to use the token management function to access the shared files. These capabilities are provided without requiring modifications to the client software.

Method, system and program products for sharing data between varied clients using token management

A server and method allocates access to a digital video movie to clients for viewing upon demand. The server receives requests to view the movie and in response, compares a number of requests to concurrently view the movie to a threshold. If the number is less than the threshold, the server allocates access for a current request to an existing copy of the movie stored on one or more disks, using bandwidth previously reserved from the one or more disks for the movie. However, if the number exceeds the threshold, the server automatically reserves additional bandwidth for future viewers if available from the one or more disks for the movie. But, if the number exceeds the threshold but such additional bandwidth is not available, the server makes another copy of the movie on another disk provided the copy can be made before the most advanced viewer completes its viewing.

Automatic replication of digital video as needed for video-on-demand

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Endicott, NY, United States of America

Timothy Peter Krein